0bin is a classic pastebin featuring client-side encryption provided by JavaScript. All pastes are encrypted before being sent to the server, and decrypted by the browser when reading them. The purpose is not so much to protect users' privacy as to prevent the service host from being forced to moderate the content by legal means.

123 Flash Chat Server is a full-featured chat server for high-load Web sites. It features a range of customization options, and can be smoothly integrated with the database of almost all leading CMS or forum systems including Joomla!, phpBB, skadate, and vBulletin. It includes plain text chat and video chat options, and is scalable enough to fit the needs of small business and large enterprises. A free 10-user edition is available. It's based on a Java server and a Flash client, but also has various alternative clients based on technologies such as HTML/AJAX, so it can run on many platforms, including iPhone and iPad. It features avatars, smilies, Flash emotions, voice messages, entering multiple rooms, dynamic skins, loading external avatars and profiles, and a media player. The HTML 5 client significantly improves the chat performance in terms of loading speed, video layout, and user interface.

AChecker is a Web accessibility evaluation tool. It can be used to review the accessibility of Web pages based on a variety of international accessibility guidelines, including WCAG, Section 508, Stanca, and BITV.

AJAPH is an object that can send AJAX requests and process the responses. It supports HTTP GET or POST requests, and synchronous or asynchronous requests with optional parameters. It can set a given page element to an image while waiting for the response. Request responses can be handled as HTML, XML, JSON, or text.

AJAX Calendar is a PHP class that can be used to display month calendars that can be browsed using AJAX. It can generate HTML and JavaScript to display a month calendar with links to browse the months using AJAX to avoid page reloading. The class can make given days be displayed as links to event pages. The browsing may be restricted to given dates. The months and week day names are customizable. The presentation details may be customized using CSS.

ARENACM is an advanced content management system with many modules and extensions. It is currently only available in Norwegian. It is professionally supported and developed in conjunction with professional designers to ensure that it looks as good as it works.

AShopV provides a shopping cart with digital goods delivery, affiliate tracking, Swoopo-style auctions, full PayPal support, support for many other payment gateways, many shipping calculation options, and multiple languages and currencies. The software also includes a CRM Sales Office with order management where you can create quotes and turn them into bills that can be paid online, set up automatic recurring billing, manage purchase orders, handle customer and vendor contact through POP3 or IMAP, and view customer and vendor history. A Shopping Mall integrates with the affiliate tracking to let you set up your own ClickBank clone.

Abacia Event is an event registration and management system that allows you to set up online and offline registration for events (seminars, conferences, expos, training, etc.). The system is very comprehensive. It allows you to register multiple ticket types, meals and other optional purchases, classes that happen concurrently, discounts, tiered pricing, and multiple registrations. Exhibitor, sponsor, and speaker registrations are supported. The exhibitor registration also has a floor plan drawing tool and a way to show the floor plans to the potential exhibitors so they can select their booth(s) and pay for them as well as create a Web page for them and allow attendees to see see the floor plan and schedule appointments with the exhibitor. There are also many other tools and features.

AcSys is a Web-based, multiuser accounting system. It support journal entry and reports such as profit-loss, balance sheet, and general ledger. Backing up and restoring the system are supported. It is designed to be easy to learn and use. It is best suited for companies ranging in size from small companies to mid-market companies.